ISSN:
0021-8995
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Copolymers of maleic anhydride and vinyl acetate containing 6 to 54 wt-% maleic anhydride were prepared in both toluene and methyl ethyl ketone by employing carboxyl-14C-labeled anhydride of demonstrated radiochemical purity. The standard copolymers thus prepared were used as reference materials in development of an automated titrimetric method for combined anhydride that had a standard deviation of 1.7 wt-% at an anhydride level of approximately 50%. The semimicrotechnique described is based on dissolution of the polymer in methyl ethyl ketone-aqueous alkali, addition of an aliquot of this solution to a slight excess of hydrochloric acid, and back titration of the excess of acid with standard alkali. The technique effectively prevents hydrolysis of the acetate groups of the copolymer.
Additional Material:
3 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/app.1975.070190508
Permalink